Its analgesic effects are only partially reversed by naloxone, hence indicating that its opioid action is unlikely the sole factor; tramadol's analgesic effects are also partially reversed by Î±2 adrenergic receptor antagonists like yohimbine and the 5-HT3 receptor antagonist, ondansetron.
Array formulas in versions before Excel 2007 cannot handle whole-column references. In Excel 2007, array formulas can handle whole-column references, but this forces calculation for all the cells in the column, including empty cells. This can be slow to calculate, especially for 1 million rows.
An alternative Excel averaging formula that doesn't evaluate zero. Excel's AVERAGE() function evaluates zero values. If you want to exclude zeroes, use these alternatives. Excel's AVERAGE() function considers zero values in its calculations, which is probably what you'd expect, but not necessarily what you want.